Pentax SF1 Manual page 17

4. Close the back cover, as illustrated.
5. Turn the main switch on. The shutter automatically
releases to advance the film to the first frame.
• The tyoe of film loaded in the camera can be checked
in the film information window,
• The film is advanced to the first frame, even if the back
is closed after the main switch is turned on.
6. Film advance automatically stops when the exposure
counter reaches the first frame, andtheCENTIC
panel appears as it does above.
The film-loaded mark lights up, and the film-advance
and end-of-film marks blink each time the film is
advanced to the next frame.
If the filmHoaded, film-advance and end-of-film
marks do not appear on the CENTIC panel, the
film is not loaded properly. Open the back cover
and reload the film.